THE elsA OBJECT-ORIENTED COMPUTATIONAL TOOL FOR INDUSTRIAL APPLICATIONS

The development of the new generation elsA software package was initiated in 1997 at ONERA. The aim is to group a very broad range of CFD capabilities together in an inter-operable and evolving software package, designed both as a tool to tackle industrial problems and as a platform for further innovative CFD developments. To meet this challenge, the project team has chosen an Object Oriented (OO) design method as well as an OO implementation. The paper describes the main features of the OO design, discuss some performance issues associated with different codings of the kernel computational loops, presents an overview of elsA transition modeling capability, and ends with several application results dealing with external and internal aerodynamics (missiles, re-entry vehicles, helicopters, turbomachinery). The broadness of the examples given here, together with good CPU efficiency, clearly demonstrates the benefits of a full OO approach.

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